The two main components of a systemic theory of international relations are realism and liberalism.
The scientific study of relationships between independent states is known as international relations (IR). It encompasses all state-to-state interactions, including conflict, diplomacy, trade, and foreign policy, as well as interactions with and between other international actors, including intergovernmental organizations (IGOs), international nongovernmental organizations.
Realism and liberalism are the two basic pillars of a systemic theory of international affairs. Along with comparative politics and political theory, international relations is frequently regarded as one of the key subfields of political science. However, it also heavily draws from international economics, law, and world history in addition to political science.
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